“Extra’s” Renee Bargh was backstage with Jennifer Lopez after her 2013 American Music Awards tribute performance to Cuban performer Celia Cruz.

The superstar revealed that Justin Timberlake was so impressed by her performance that he stopped by her dressing room to congratulate her.

Lopez laughed, “He was like, ‘Oh my god, what was that?’ He said if it wasn't so violent, ‘I would punch you in the face right now cause I’m so excited! It’s best performance I’ve ever seen of you.' I’m a huge fan of his as well. I was very touched. It made me feel good.”

JLo also talked about her four-part AMA interactive fan campaign for Kohl’s Black Friday extravaganza, in which she does a bunch of crazy stunts, some of them herself. Jennifer said, “I did not do all of them myself… I don’t think there is one actor alive, maybe Jackie Chan, who does all their stunts. You do as much as you can and it's fun.”